Oxygen: Oxygen in the air reacts Using the gas in a chemical approach termed combustion. Most fires demand an environment with no less than sixteen% oxygen content to burn, which can be readily available in many environments on the planet. The 1st human beings to regulate fire little by little https://car-park-extract-systems67889.blog2news.com/37235877/not-known-factual-statements-about-car-park-extract-systems